I have a small idea that i don't know if it would be good to add or not, but you should consider adding an area for the DM to do private rolls in a normal room without having to open multiple dice rooms.

It still would be good to have ability to make secret rolls between player and DM without alerting others. Sending screenshots of using /self is too tedious. Besides, those can be easily faked. And opening eight dice rooms for a single game feels somehow wrong...

I kinda agree it would be nice to send secret rolls to other people, but I also think if you're the GM and you have to send _screenshots_ of /self results to players, you probably have more trust issues in your group than Rolz can address ;)